Subtract 81/36 from 4/70, Solve 4/70

Subtract 81/36 from 4/70

1^st number: 4/70, 2^nd number: 2 9/36

4/70 - 81/36 is -307/140.

Find the least common denominator or LCM of the two denominators:
LCM of 70 and 36 is 1260

Next, find the equivalent fraction of both fractional numbers with denominator 1260
For the 1st fraction, since 70 × 18 = 1260,
4/70 = 4 × 18/70 × 18 = 72/1260
Likewise, for the 2nd fraction, since 36 × 35 = 1260,
81/36 = 81 × 35/36 × 35 = 2835/1260
Subtract the two like fractions:
72/1260 - 2835/1260 = 72 - 2835/1260 = -2763/1260
After reducing the fraction, the answer is -307/140

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